Grit Washer / Classifier

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Grit Washer / Classifier

Model SP | Model SP-P


The Pro-Equipment Grit-Guard provides a cost effective means for washing, dewatering and conveying separated grit or sand from wastewater. This rugged Headwork’s Classifier offers two model types.

  • Receives grit from grit separation system to be further washed, dewatered and conveyed

  • Screw conveyor transports collected grit through inclined trough to discharge at the upper end

  • Tank, trough, and screw conveyor made of 300 series SS. High strength steel augur is an option

  • Wide range of tank sizes to handle specific grit slurry loads

  • Top mounted cyclone available to increase removal of finer grit particles and reduce hydraulic load to classifier

The Model-SP

Grit-Guards standard Grit Washing Classifier comprised of a collection tank and a motor driven inclined screw conveyor. The tank walls are uniquely shaped and engineered to accommodate the conveying trough.

The Model-SP-P

Carbons all the features and grit handling capabilities as the Model-SP, plus has an additional washing agitator for applications that require additional grit washing.

When installed near a grit chamber, both Grit-Guard models return separated water back into the grit chamber. Water, free from sediments, but containing some organics, is streamed through an overflow trough were a connecting pipeline transfers it to the next treatment process stage.

The Stainless Steel Grit-Guard models are manufactured to deliver long service life in either indoor or outdoor locations. When installed outdoors, the Grit-Guard can be equipped with both insulation and an electrical heater to hold-up to harsh, inclement weather. An open-air thermostat is also available to operate the heating element during the winter season.


Grit is agitated, washed and conveyed up an inclined open trough by a Helix Screw that’s powered by an electric gear motor. The spiral rotating Helix Screw efficiently moves separated materials up the trough where it is discharged through a top chute falling into a receptacle for final disposal.


  • Flow Rate: 80-240 gpm (300-900 l/min)

  • Power Input: 1 HP

  • Helix Incline: 30°

  • Efficiency: 95% (sand size >0.2mm)

  • Material Discharge: Upper End of Classifier

  • Application Conditions: Standard

  • Installation: Above Ground | Indoors or Outdoors

  • Material: Stainless Steel (300 Series)


  • Highly-Adaptable with Numerous Add-Ons

  • Simple Installation

  • Wide Range of Tank Sizes for Slurry Loads

  • Optional Insulation and Heating Element

  • Optional Top-Mounted Cyclone for increased grit removal


  • Wastewater Treatment Plants